Designation:E10−17AmericanAssociationStateHighwayandTransportationOfficialsStandardAASHTONo.:T70–86StandardTestMethodforBrinellHardnessofMetallicMaterials1ThisstandardisissuedunderthefixeddesignationE10;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope*1.1ThistestmethodcoversthedeterminationoftheBrinellhardnessofmetallicmaterialsbytheBrinellindentationhardnessprinciple.ThisstandardprovidestherequirementsforaBrinelltestingmachineandtheproceduresforperformingBrinellhardnesstests.1.2Thisstandardincludesadditionalrequirementsinfourannexes:VerificationofBrinellHardnessTestingMachinesAnnexA1BrinellHardnessStandardizingMachinesAnnexA2StandardizationofBrinellHardnessIndentersAnnexA3StandardizationofBrinellHardnessTestBlocksAnnexA41.3ThisstandardincludesnonmandatoryinformationinanappendixwhichrelatestotheBrinellhardnesstest:TableofBrinellHardnessNumbersAppendixX1ExamplesofProceduresforDeterminingBrinellHardnessUncertaintyAppendixX21.4AtthetimetheBrinellhardnesstestwasdeveloped,theforcelevelswerespecifiedinunitsofkilograms-force(kgf).AlthoughthisstandardspecifiestheunitofforceintheInternationalSystemofUnits(SI)astheNewton(N),becauseofthehistoricalprecedentandcontinuedcommonusageofkgfunits,forcevaluesinkgfunitsareprovidedforinformationandmuchofthediscussioninthisstandardreferstoforcesinkgfunits.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.6Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopme...
